Clarkson, P. C. (1982). Pre-university mathematics courses. Mathematics Education Centre, Papua New Guinea University of Technology.
Chicago-viite (17. p.)Clarkson, P. C. Pre-university Mathematics Courses. Lae: Mathematics Education Centre, Papua New Guinea University of Technology, 1982.
MLA-viite (9. p.)Clarkson, P. C. Pre-university Mathematics Courses. Mathematics Education Centre, Papua New Guinea University of Technology, 1982.
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